I prefer not to invest into ICOs, not by the sole fact of being an ICO, but because most ICO proposals that I've seen so far don't make much sense. That's also the reason why I avoid reading the whole whitepaper. But I bet that not even half of the people who put money into it read the whole thing.
To add to your concern, most ICO's are still just businessplans, without any real product or usage. That's why I invested in Change Bank, because they're already in business. THey're now working towards becoming the first decentralized crypto bank with features such as paying all around the world in an instant with your cryptos, investing, applying for loans, getting insurance, and so much more.